The stakes are high. There can only be one true victor in all fart battles: fart tennis, volume contests, holding it in during school/funerals/weddings/sex, and now, in iPhone apps. Who will reign supreme?

Here's a better way to pay for stuff. By just touching your fingertip to this Pay by Touch biometric system, you can pay for anything in the ten Chicago Shell stations that are now testing the tech. So this means there's no need to reach for that credit card or even your wallet; all you have to do is touch a certain…